Nepalese glaciers locate so remotely that they are very difficult to access and less studied regions in the High Asia. The primary goal of this article is to dissect the characteristics of the variation of the Nepalese glaciers during 1980 - 2010. The theory of the study is the glacier system,which regards the glaciers that have some characteristics on an average as a single unit,that can be divided by a river,mountain or region. Triple Nepalese glacier inventories, the Landsat data and the Digital Elevation Model (DEM) were analyzed by using Geographic Information System (GIS) technology and Excel. The data are analyzed from 1980 through 2010. To test the statistical results,the glacier system function model,a dynamic model of glacier change tendency under climate change,which is able to simulate the glacier change macroscopically,was served to simulate the historical glacier change. The result shows that: (1) The mean glacier size in Nepal is small,about 1.02 km~2; the glacier equilibrium line altitude (ELA) distributes in a large span,most of which is between 3 250 and 8 650 m. s. l.,with a mean ELA of 5 601 m a. s. l. (2) Topography has a determining role to the ELA of Nepalese glaciers. The ELA is rising with latitude with many eminent centers around the mountain peak. (3) During 1980 - 2010,the Nepalese glaciers had retreated as a whole,while the glacier amount had increased with glacierized area / reserve decreased,i. e.,378 glaciers increased and glacierized area and reserve reducing 24% and 29%,respectively,as a whole. Smaller glacier shrank quicker than the larger one. Ratio of glacier retreat was very dissimilar to each other in the altitude belt from 3 150 m a. s. l. to 8 650 m a. s. l.,with a ratio of - 0.01% ~ - 3.33% per year. The Nepalese glaciers reduced faster during 1980 - 1990 than that in other two decades. And every sub-glacier system had its own change pace; the smaller sub-glacier system changed quicker than the larger one. (4) Using the historical temperature change rate as the parameters of the glacier system function model,it is possible to imitate the historical glacier system change under global warming.